Cita APA (7th ed.)

Cumper,George E. (1991). The evaluation of national systems. Oxford University Press.

Cita Chicago (17th ed.)

Cumper,George E. The Evaluation of National Systems. New york: Oxford University Press, 1991.

Cita MLA (8th ed.)

Cumper,George E. The Evaluation of National Systems. Oxford University Press, 1991.